Biodegradation of used engine oil in a wastewater sludge-amended agricultural soil

Authors : EFSUN DİNDAR, FATMA OLCAY TOPAÇ ŞAĞBAN, HÜSEYİN SAVAŞ BAŞKAYA

Pages : 631-641

View : 22 | Download : 11

Publication Date : 2016-08-01

Article Type : Research Paper

Abstract :Soil contamination by used engine oil is a common occurrence in most developing countries. This has been shown to have harmful effects on the environment and human beings at large. Used oils are considered to be hazardous waste materials. These are composed of toxic chemicals, such as heavy metals insert ignore into journalissuearticles values(which come from additives and wear and tear of engine parts);, combustion products, light hydrocarbons, polar compounds, uninuclear and polynuclear aromatic compounds, resinous materials, and organometallic compounds. Some of these pollutants are carcinogenic in nature. The objective of this study was to evaluate the effects of used engine oil insert ignore into journalissuearticles values(doses of 0.5% and 5%); with hydrocarbon pollution on total petroleum hydrocarbon insert ignore into journalissuearticles values(TPH); removal from soil and determine the fate of TPHs at different temperatures insert ignore into journalissuearticles values(18 °C and 28 °C); during an incubation period of 240 days. The possible use of wastewater sludge as a biostimulating agent in used engine oil-contaminated soils was also evaluated. The results of 240 days of incubation indicated that TPH removal percentages in used engine oil-contaminated+sludge amended soils at 18 °C were 68% and 66% for doses of 0.5% and 5%, respectively. Incubation at 28 °C resulted in higher TPH removal with values of 56% insert ignore into journalissuearticles values(dose of 0.5%); and 74% insert ignore into journalissuearticles values(dose of 5%);. Based on the first-order kinetics model, the high dose insert ignore into journalissuearticles values(5%); of used engine oil-contaminated soil amended with wastewater sludge showed the highest biodegradation rate of 0.00562/day and half-life of 123.13 days at the end of the incubation period at 28 °C. These rates were significantly higher than those of the control soil insert ignore into journalissuearticles values(0.00366/day and 189.01 days);.
Keywords : Biostimulation, used engine oil, soil, total petroleum hydrocarbons, wastewater sludge